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Intramolecular cyclization of allylic propiolates mediated by the addition of stannyl radicals: A new synthetic route to α-methylene-γ-butyrolactones

✍ Scribed by Eun Lee; Sung Bo Ko; Kyung Woon Jung; Moon Ho Chang

Publisher: Elsevier Science
Year: 1989
Tongue: French
Weight: 116 KB
Volume: 30
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)80626-2

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✦ Synopsis

Allylic propiolates react with tributyl-or triphenylstannane to yield a-(stannyljmethylene-y-butyrolactones. a-Methylene-y-butyrolactones are easily prepared by destannylation.

📜 SIMILAR VOLUMES

Intramolecular cyclization of acetylenic

Intramolecular cyclization of acetylenic homoallylic ketones mediated by the addition of stannyl radicals; a short facile pathway to α-methylene-β-substituted cyclopentanones

✍ Eun Lee; Chang-Uk Hur; Jeong-Ho Park 📂 Article 📅 1989 🏛 Elsevier Science 🌐 French ⚖ 102 KB

c-(Stannyl)methylenecyclopentanones are obtained by tributylstannane addition reactions of acetylenic homoallylic ketones. a-Methylenecyclopentanones are produced upon destannylation.